Domestic watek heater



Feb. 27, 1934. A, RUSSO 1,948,735

DOMESTIC WATER HEATER Filed Oct. 31, 1932 M72? JZJr-aw JPa d'Jo Patented Feb. 27, 1934 UNITED STATES PATENT OFFICE DOMESTIC WATER HEATER Andrew Russo, Fitchburg, Mass.

Application October 31, 1932. Serial No. 640,516

1 Claim.

This invention relates to a domestic water heater designed to utilize a substantial portion of the heat of the flue gases from a stove or furnace.

It is the general object of my invention to provide a heater of this type which may be easily and economically constructed and installed, and which will be exceptionally reliable and efficient in operation.

A further object is to provide a construction by A preferred form of the invention is shown in the drawing, in which Fig. 1 is a side elevation of my improved heat- -ier assembled in position for use;

Fig. 2 is an end elevation, taken along the line 22 in Fig. 1;

Fig. 3 is a sectional side elevation of the heater,

and

the line 4-4 in Fig. 3.

Fig. 4 is a sectional end elevation, taken along Referring to the drawing, I have shown a flue 10 connected to form a portion of the smoke pipe of a range or furnace or other heating apparatus.

My improved water heater also comprises a preferably cylindrical drum or casing 12 having heads 13 and 14 provided with outwardly extending flanges 15 and 16, said flanges closely fitting the flue 10 and forming water-tight joints therewith.

The flanges l5 and 16 are preferably eccentrically located in the heads 13 and 14, so that the flue 10 passes through the lower portion of the casing 12, as clearly shown in Figs. 3 and 4.

A water inlet or supply pipe 20 is connected to the heater through the lower portion of the casing 12 and a water outlet or delivery pipe 22 is connected through the upper portion of the casing 12.

A heating coil 30 is mounted within the flue 10 and extends longitudinally thereof.

The inlet end 31 of the coil is connected around the end of the flue 10 and through the head 13 to the water space of the casing 12 at a point not far "removed from the inlet pipe 20. The other end 32 of the coil is connected around the opposite end of the flue 10 and through the head 14 to the water space of the casing 12 near the opposite end of the casing and relatively adjacent to the ioutlet pipe 22.

In the commercial construction of my invention, the flue 10 is preferably a separate piece of pipe of somewhat heavier construction than ordinary stove pipe and forms a permanent part of the water heater. The flue 10 is of such diameter, however, as to be conveniently connected into the usual stove or furnace pipe S, which may be easily notched and fitted around the coil connections. r

I also find it desirable to provide a depending extension 50 of the flue 10 to which the leakage, if any, from the casing 12 to the flue 10 will be conducted. An upwardly swinging door 51 normally closes the extension but permits escape of any substantial accumulation of water.

Having described the details of construction of my improved water heater, the operation and advantages thereof will be readily apparent. A rapid interchange of heat occurs between the flue gases and the water in the coil 30, causing the water to circulate through the coil and to escape at the end 32 thereof, such escaping heated water being replaced by cooler water entering the end 31 which is adjacent the inlet pipe 20.

The heated water naturally rises in the casing 12 and may be drawn off through the outlet pipe 22. While the water in the coil 30 is more rapidly heated, the water in the casing 12 surrounding the flue 10 also takes up a substantial amount of heat and thus increases the rapidity of operation of the heater.

In practical operation it is found that a heater constructed as above described furnishes an ample supply of water heated to as high a temperature as is desirable for domestic purposes.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:-

A domestic water heater comprising a substantially cylindrical casing horizontally positioned when in use and having a water inlet at the bottom and adjacent one end of said casing and a water outlet at the top and adjacent the other end of said casing, said casing having also outwardly extending annular flanges eccentrically positioned in the opposite ends of said casing and substantially nearer the bottom edges thereof, a relatively heavy pipe section extending as a single piece through said casing and beyond said flanges, said pipe section closely fitting said flanges and being permanently secured in watertight relation therein, the ends of said pipe section being adapted to flt within commercial smoke fines, and, a heating coil mounted in the pipe section at the water inlet end and the other end of said coil being connected to said casing above said pipe section at the water outlet end, said casing, pipe section and heating coil constituting a unit when assembled but said heating coil being readily removable from said pipe section.

ANDREW RUSSO. 

